1 day after people:The lights of the US Capitol Building in Washington,D.C go out from the bottom up. 

1 year after people: Despite the neglect the US Capitol building appears unchanged, even the Civil-war era cast iron dome is continuing to keep out the elements, but the dome is painted and as the paint breaks down rust will begin to form on the dome.

100 years after people:The paint has beeen weathered away and the dome of the Capitol Building is now rusting. Rain pools on the dome hastening corrosion. Birds build nests on the dome.

250 years after people: The weight of the Statue of Freedom on top of the Capitol Building's corroded cast iron becomes too great for the dome to handle and the dome swallows itself, pulling a symbol of America down, into a swamp.